Sound and shock absorber.



J. B. OGDEN.

SOUND AND SHOCK ABSORBER. APPLICATION FILED 001225, 1911.

. Patented Aug. 20, 1-912.

JOHN BROWNING OGDEN, F LYNCHIBURG, VIRGINIA. v M i SOUND AND SHOCK ABSORBER.

Patented Aug. 20, 1912. Application filed October 25,1311 Serial No. 656,636. i i

. 1,036,313," Specification of Letters Patent.

i f To all whom it may concern: a detail perspective view of the cushion Be itknown that 1, JOHN OGDEN,- a spring and the foot of themachine. citizen of the United States, residing at In these drawings the numeral 1 indicates Lynchburg, in the county of Campbell and a metallic cup having its bottom cent-rally 5 State of Virginia, have invented a new and pierced for the reception of a screw 2, useful Sound and Shock Absorber, of which whereby it is securely held to the table top the following is a specification. 1 or other su port 3. Within the cup 1 is This invention relates to sound and shocksnugly fitte a thimble 4 of rubber or. other absorbers for typewriters, calculating masuitable resilient material, and within the j 10 chines, and thellke, and has for its object; recesss 5 of the thimble is disposed a padfi L the provision of, means for attaching and of felt or the like which assists iniabsorbing 1 supporting .typewriters and other writing the vibration and serves to prevent the bot-- tom of the rubber thimble 4; from being'cut l machi'nes upon a table or desk in such manv her that the-machine shall be firmly secured by; the lower end of the helical spring 7 which is seated'thereon This spring isof 15 to and yet be the highest degree vi-i I bratorily insulated therefrom, to the end ,anouter dlametercorresponding to the interior diameter of the thimble 4, and of an that the noise of operation shall be reduced IIltBIlOI' diameter corresponding to the outer diameter of the rubber foot 8 which is ordito a minimum, and-the shock due to key and type bar-impact-shall be absorbed, and

nar'ily employed as a support for typewrit ers,'having its shank:9 seated in arecess 10 thus the consequent strain upon the nervous 2 0 I and muscular 'system of the operator, and

also the wear and tear upon the machine,

reduced, if not entirely-eliminated.

' 1 ,;The invention vhasfor a further object the provision of'means for adjusting the actionof the absorbing device. to suit'the touch of,the individual operator, and at the same time enabling from its. posltion and reattached Without- 30 the machine to be released disturbing such adjustment. 1

With the above and other objects in view,

' which will be readily apparent as the construction and operation is described, the in 'vention consists in the novel construction of features, arrangement and comblnation of parts particularizedinthe appended claims, and, which will now be described in detail in connection and with reference to the accompanying illustrative drawings showing the preferred embodiment of the It is formed in the under sideofthe vframe 11 of the typewriter. The length and resistance of the spring 7 is carefully calculat ed to be from the rim l'Qfof the; 1thimb1el Under ordinary conditions ".of use the vibration of the machine and consequentv play .ofthe spring will be within such limits that ,{the

bottom of the frame 1l.wil1not"i1npi nge against therim 12 and yetthe rim of the.

thimble will serve as an emergency. resilient stop under extraordinary conditions.

The invention as thus far explained pre sents a very sensitive means for reducing the vibration and sound of writing machines in use, the resilient rubber thimble, the. felt pad, and the sprmg cooperating to produce these results in a very high degree. It has been found, however, that-the vibration-50f I a typewriter differs under the manipulation of different operators by reason of the ,nature of the" touch,- as well as its force.

It follows that devices adjusted to take up the vibration of a machine whenwopera ted by one person require a diHerent-adjustment, T I in order to perfectly perform the same tune-' tion for another. With this condition in." view, my invention provides further for the j adjustment of the'tension of the shock ab sorber just describedtoadapt. ,itqto th'e exigencies of; use un'der l different str am-j,

invent-ion with certain modification. to be understood, however, that while the drawings show a complete operative form of the invention, the latter is not confined to the exact construct-ion illustrated.

In the drawings :--Figure 1- is a side elevation of a part of a typewriter frame with the invention in. place. Fig. 2 is an end, View of Fig. 1. Fig. 3 is a vertical section 50 .through 'a'portion of the device with a part of-the typewriter frame broken away to .show'. the manner of attachment thereto. Figs. i and 5 are detail perspective views of modifiedfor'ms-of clamping clip. 'Fig. 6 is.

stances. To this end I provide the rim of the cup 1 with an ear 13 with which is engaged the eye 14 of a link 15, the latter being mounted for axial movement within alined apertures 16 and 17 formed in the angular offset portion of a cli 18 arranged to lie against the side face the machine frame and to overlie the same and with rearward extensions 19 and engage the rear face thereof with lips '20,'the portion 19 being' preferably provided with corrugations 21in order'to permit of expansion within certain limits and; to engage frames ,of different width. A wing nut 22 is threaded upon the projecting end ofthe link and between said nut and the upper. face ofthe angular offset portion 23 of the clip is disposed a helical adjusting spring 24.

By. means of the nut 22 acting upon the spring 24 the tension of the'spring 7 is regulated, 'so that its sensitiveness is effectually controlled and adapted to the requirements of the operator. The clip and link serve at:

' the same time as a convenient'means of conbodily out of the s The screws 2 may be omitted when'itis} ne'cting the shock absorber to the type-writer and enable the connection 'to be loosened without changing in any'vwaythe .adjust-' ment, the cli being merely lifted against; the tensiono the spring 24 out of engagement with {the upper edge of the frame whereupon the t-y ewriter may be lifted ock absorber.

not desired to fasten the machine to the tab1e,'in which case the connection between: the shock absorber and machine frame would I serve to couple them securely together while; 'themachine is moved from place to placej The clip used ma be that illustrated in Fig. -13 or where the s ock absorber isin've'rticalj alinement with an upright25 offth'e machine 'fr'a-me that form of clip shown ifi-Fim =3and in detail in Fig. at may be employed-"toad vantage.

the-form of clip shown iii-Fi' armybe; employed." This clip is-simpla'in'forin and} i has but one aperturejfor,theguidirgfof the link 15, and in most cases is quite--12 V v In the device as'a whole, the several='partls". cooperate to ienti; I

practically;eliminate vibration, including the rebound of the lower'sprin- 7 and thimble Itwill be-observdfthat" the downward impulse given the. machine upon the striking v p the members beneath the machine and'g'u on "the recovery, therebound of such resihent' ment to conform to theindividuality'ofgnot L'- parts is gradually and'progressivelvresist-j ed by the spring.24,-.so that,-in effect, the" vibration is entirely absorbed and a state of normal equilibrium maintained between the oppositely acting springs 7 and 24-, the

relation of which to the'two extremesfand its susceptibility toandthe range "off-its disturbance is capable-of sensitive adjust".

.requirements of one machine within the thimble, I being so related ,,-tothe weight of the ma, chine and the size and position of the thimble -as to'sup-port the writing machine, under all Under some circumstances} also,

of each key is resisted by ing'm'achines and the like,

i a *helical' springsmountedk seated'in the ma- 'nected to the 'thimble, fina'chine frame,"r's aid"clip having an an'gu-Q "larly bent' only the operator but of the machine as well,

it being recognized that machines of the same make. and to all appearances identical in construction have an individuality of their own and differ markedly in their response tothemanipulation of their keys, wherefore'vibratory insulators suited to the are very often entirelyunsuited to another. This difliculty is overcome, in the 'present case, by the provision of means for adjusting the reaction between the twooppositely acting springs of the. sound and shock absorbing device.

, What is claimed is comprisinga thimble of resilient material open at the t'opvand closed at the bottom, a

helical springof an external diameter to enter the open" end of-the Thimble and rest upon the bottom ,thereof aud of an internal diameter to snugly embrace the foot of the machine, the-foot and spring both working the tension of the spring conditions of-usefwith the open upper end of the thimble in *spaced close relation to that "portion ofthe frame of the machine froin'whichthe foot projects.

- 2.Anattach-mentvfor writing' machines and the like having frames provided with sup orting feet, comprising a thimble of resi ient material; a metallic cupadapted to seat. the thimble and of a height to ap- 'proach the open end of the thimble, a pad of yield'able material lodged within the thimble at the closed endthereof, and a helical spring having one end adapted to the interior ofthe thimble and the other end of a diameter to closely embrace the supporting. foot ofthe' machine to which the 'attachnrrent' is applied, the spring and thim- 'ble being related to support the writing mav 1. An attachment for writing machines and the like-provided with supporting feet,

chine{under--normaliconditions of*use with in the'thimble, and'a foot the, s'upporting 'foot of the -machine enter;

the open end-"of 't-he thinible',;and,with,. saidflopen end ofthe thimble in" cl0se relav tion -to;the frame-ofithejmachine' adjacent L g gthelfoot'to engage the frame andserve 'as an" elastic buifer for'movements-of the ma fchine'under the conditions of use; I j" T 1 3- A sound'and shock absorber for writ-=1 Y chine frame and projecting 'downwardl'yi' v int'o'fengagementwith the spring, in combination with a connection between the thimable and machine, comprising a link con-:

a clip to engage the portion perforated to receive the link, 'adjust1ng means on'- the endof the link,

and a compression spring interposed between said adjusting means and the angularly bent portion of the clip.

' t. A sound and shockabsorber for writing machines and the like, comprising a metallic cup, fastening means to secure the same to a suitable support, a rubber thimble closely fitting within the cup, a felt pad disposed in-the bottom of the thimble, a helical compression springmounted in the thimble upon the pad, a rubber foot having a shank seated in the machine frame with the foot portion projecting downwardly into engagement with the spring within the thimble, in combination with a connection between the thimble and machine comprising a link attached to the cup, a clip to engage the ma-- closely fittin within the cup, a felt pad disposed in the ottom of the thimble, a helical compression spring mounted in the thimble upon the pad, a rubber foot having a shank seated in the machine frame with the foot portion projecting downwardly into engagement with the spring within the thimble, in combination with a connection between the thimble and machine comprising a clip arranged to overlie the machine frame and havlng a downwardly extending member provided with an outwardly, downwardly and then inwardly bent portion having alined apertures formed in the outwardly and inwardly bent portions, a link pivoted to the cup and extending through the alined apertures of the clip, an adjusting nut threaded upon the projecting end of the link, and a compresslon spring interposed between the nut and angularly bent portion of the clip.

6. A sound and shock absorber for writing machines and the like having supporting feet, comprising a thimble of res1lient material open at the top to receive a foot of the machine and having a closed bottom, a helical spring having one end adapted to enter the thimble and rest upon the closed bottom and the other end to embrace a foot of the machine, a clip to engage the machine frame, a link connected to the thimble and means to secure the same to a suitable support, a rubber thimble as m own,-I have passing through the clip and a sprin mounted on the link and working in oppr Isition to the spring within the thimble.

7. An attachment for writing machines and the like having frames supporting feet, comprising a thimble of resilient material, a metallic cup adapted to seat the thimble and of a height to ap the open end of the thimble, and a elical spring havingone end adapted to the inte- 1101 of the thimble-and the other end of a diameter to closely embrace the supporting foot of the machine to which the attachment ista plied, the spring and thimble being renormal conditions of use with a supportin foot of the machine entering the open end 0 the thimble and with provided with said open end of the.

roach to support the writing machine under thimble in close, spaced relation to the frame 7 of the machine adjacent the foot to engage the frame and serve as an elastic buffer for Y movements of the machine under conditions of use.

8.- Ina sound and shock absorber for writ ing machines. and the like, a metallic cup, elastic means adapted to be interposed between the cup and the frame of the machine, and a connection between the metallic cup and the machine comprising a link attached to the on a clip to'engage the machine frame an having an angularly bent;

-90 the end of the'link, and a portion perforated to receive the link, an

adjusting nut on compression spring interposed between said a nlut a-nd the angularly be'nt 'portion oi -the c1 i I I As'ound andshock absorberfor writing machines and the like havingsupporting feet, comprising a thimble open at the top, to receive a a closed bottom, a helical sprin havin end adapted to enter the thim le an rest upon the closed bottom and having the other end engaging a foot of the-machine, a clip adapte at one side of and above the thimble, and a spring actuated link connection between the clip and the thimble, frame is tied to the thimble, the spring of said link connection acting in opposition to the spring within-the thimble.

' In test mony, hat'I claim the foregoing ture in'the resence of two witnesses.

. J SHN BROWNING OGDEN.

Witnessesz a VIRGINIA E. Cowman,

foot of the machineand having I i one to engage the frame of-the machine whereby the machine hereto aflixed my signa- 

